function Layer(){
	this.children=new These();
	this.canvas=new It();
	this.render=function(context){
		for(var i=0;i<this.children.size();i++){
			this.children.find(i).render(context);
			}
		};
	this.child=function(r){
		this.children.child(r);
		return this;
		}
	}